ASL INTERCOM PS 260T Gebruikershandleiding - Pagina 4

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5.0

FRONT PANEL CONTROLS

The PS 260T contains two identical interface modules. Each interface has the following front panel controls:
1
POWER LED indicator
This LED illuminates if line power is supplied by an
ASL separate power supply or an ASL master
station, via the intercom party line
2
INPUT LEVEL control knob
This knob controls the level of the audio input signal
before it is placed on the intercom line
3
OUTPUT LEVEL control knob
This knob controls the level of the intercom audio
signal appearing at the output connector
4
SIDE TONE LEVEL trimmer
This trimmer controls the input/output separation
5
SIDE TONE HI trimmer
This trimmer controls the input/output separation in
the high frequency range
6
SIDE TONE TEST knob
This hidden push button activates a test tone
generator which adds a 200 Hz tone to the audio
input circuitry. This to assist adjusting or checking
the side tone trimmer settings.
6.0

REAR PANEL CONNECTORS

The PS 260T contains two identical interface modules. Each interface has the following rear panel connectors:
7
AUDIO INPUT connector (XLR-3)
The input is transformer balanced.
Pin assignments :
Pin 1:
0V / ground shield
Pin 2:
signal +
Pin 3:
signal -
8
AUDIO OUTPUT connector (XLR-3)
The output is transformer balanced and capable of
driving a 600 ohms load.
For pin assignments see #7:
PAGE 4
User Manual PS 260T / Issue 2010 © ASL Intercom BV
..
The momentary push button can be reached with a
pin or pen.
Side tone adjustment procedure:
Connect a monitor amplifier + speaker to the
audio output
Turn up output level of the PS 260T to
approx. 50%
Bring the side tone trimmers in start position:
Level trimmer: turn fully clockwise
Hi trimmer: turn fully anti clockwise
Activate the test tone generator.
Minimize test tone level by turning the level
trimmer anti clock wise.
Minimize the remaining high frequencies of
the test tone by turning the hi trimmer
clockwise.
Repeat the two last mentioned procedures to obtain
the lowest possible test tone levels.
The test tone is also heard by the users of the party
line intercom, which is rather disturbing. ASL advises
to not activate the test tone when the party line
intercom system is in use.
9
INTERCOM IN connector (XLR-3)
This connector is for connecting the intercom party
line. Pin assignments :
Pin 1:
0V / ground shield
Pin 2:
+30V power wire
Pin 3:
audio wire
10
INTERCOM LINK connector (XLR-3)
This connector is for extending the intercom party
line to other user stations or interface units. For pin
assignments, see #9 .